Both sync to python 3.6. Is there a way to verify that I am using python3 to execute script? My package mgr describes Sublime Text as python 3. I can do an import csv and that is verified.
I saw in the first error message sequence that I posted that I have Missing required dependencies ['pytz', 'dateutil']. I checked with my package manager and installed python3-dateutil and python3-pytz. This removed dateutil as a missing dependency, but pytz remains in the error message. Seems like a good clue, but not there yet.